cpu.c (6223B)
1 /* 2 * QEMU HPPA CPU 3 * 4 * Copyright (c) 2016 Richard Henderson <rth@twiddle.net> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see 18 * <http://www.gnu.org/licenses/lgpl-2.1.html> 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qapi/error.h" 23 #include "qemu/qemu-print.h" 24 #include "qemu/timer.h" 25 #include "cpu.h" 26 #include "qemu/module.h" 27 #include "exec/exec-all.h" 28 #include "fpu/softfloat.h" 29 30 31 static void hppa_cpu_set_pc(CPUState *cs, vaddr value) 32 { 33 HPPACPU *cpu = HPPA_CPU(cs); 34 35 cpu->env.iaoq_f = value; 36 cpu->env.iaoq_b = value + 4; 37 } 38 39 static vaddr hppa_cpu_get_pc(CPUState *cs) 40 { 41 HPPACPU *cpu = HPPA_CPU(cs); 42 43 return cpu->env.iaoq_f; 44 } 45 46 static void hppa_cpu_synchronize_from_tb(CPUState *cs, 47 const TranslationBlock *tb) 48 { 49 HPPACPU *cpu = HPPA_CPU(cs); 50 51 #ifdef CONFIG_USER_ONLY 52 cpu->env.iaoq_f = tb_pc(tb); 53 cpu->env.iaoq_b = tb->cs_base; 54 #else 55 /* Recover the IAOQ values from the GVA + PRIV. */ 56 uint32_t priv = (tb->flags >> TB_FLAG_PRIV_SHIFT) & 3; 57 target_ulong cs_base = tb->cs_base; 58 target_ulong iasq_f = cs_base & ~0xffffffffull; 59 int32_t diff = cs_base; 60 61 cpu->env.iasq_f = iasq_f; 62 cpu->env.iaoq_f = (tb_pc(tb) & ~iasq_f) + priv; 63 if (diff) { 64 cpu->env.iaoq_b = cpu->env.iaoq_f + diff; 65 } 66 #endif 67 68 cpu->env.psw_n = (tb->flags & PSW_N) != 0; 69 } 70 71 static void hppa_restore_state_to_opc(CPUState *cs, 72 const TranslationBlock *tb, 73 const uint64_t *data) 74 { 75 HPPACPU *cpu = HPPA_CPU(cs); 76 77 cpu->env.iaoq_f = data[0]; 78 if (data[1] != (target_ureg)-1) { 79 cpu->env.iaoq_b = data[1]; 80 } 81 /* 82 * Since we were executing the instruction at IAOQ_F, and took some 83 * sort of action that provoked the cpu_restore_state, we can infer 84 * that the instruction was not nullified. 85 */ 86 cpu->env.psw_n = 0; 87 } 88 89 static bool hppa_cpu_has_work(CPUState *cs) 90 { 91 return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI); 92 } 93 94 static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info) 95 { 96 info->mach = bfd_mach_hppa20; 97 info->print_insn = print_insn_hppa; 98 } 99 100 #ifndef CONFIG_USER_ONLY 101 static G_NORETURN 102 void hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr, 103 MMUAccessType access_type, int mmu_idx, 104 uintptr_t retaddr) 105 { 106 HPPACPU *cpu = HPPA_CPU(cs); 107 CPUHPPAState *env = &cpu->env; 108 109 cs->exception_index = EXCP_UNALIGN; 110 if (env->psw & PSW_Q) { 111 /* ??? Needs tweaking for hppa64. */ 112 env->cr[CR_IOR] = addr; 113 env->cr[CR_ISR] = addr >> 32; 114 } 115 116 cpu_loop_exit_restore(cs, retaddr); 117 } 118 #endif /* CONFIG_USER_ONLY */ 119 120 static void hppa_cpu_realizefn(DeviceState *dev, Error **errp) 121 { 122 CPUState *cs = CPU(dev); 123 HPPACPUClass *acc = HPPA_CPU_GET_CLASS(dev); 124 Error *local_err = NULL; 125 126 cpu_exec_realizefn(cs, &local_err); 127 if (local_err != NULL) { 128 error_propagate(errp, local_err); 129 return; 130 } 131 132 qemu_init_vcpu(cs); 133 acc->parent_realize(dev, errp); 134 135 #ifndef CONFIG_USER_ONLY 136 { 137 HPPACPU *cpu = HPPA_CPU(cs); 138 cpu->alarm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 139 hppa_cpu_alarm_timer, cpu); 140 } 141 #endif 142 } 143 144 static void hppa_cpu_initfn(Object *obj) 145 { 146 CPUState *cs = CPU(obj); 147 HPPACPU *cpu = HPPA_CPU(obj); 148 CPUHPPAState *env = &cpu->env; 149 150 cpu_set_cpustate_pointers(cpu); 151 cs->exception_index = -1; 152 cpu_hppa_loaded_fr0(env); 153 cpu_hppa_put_psw(env, PSW_W); 154 } 155 156 static ObjectClass *hppa_cpu_class_by_name(const char *cpu_model) 157 { 158 return object_class_by_name(TYPE_HPPA_CPU); 159 } 160 161 #ifndef CONFIG_USER_ONLY 162 #include "hw/core/sysemu-cpu-ops.h" 163 164 static const struct SysemuCPUOps hppa_sysemu_ops = { 165 .get_phys_page_debug = hppa_cpu_get_phys_page_debug, 166 }; 167 #endif 168 169 #include "hw/core/tcg-cpu-ops.h" 170 171 static const struct TCGCPUOps hppa_tcg_ops = { 172 .initialize = hppa_translate_init, 173 .synchronize_from_tb = hppa_cpu_synchronize_from_tb, 174 .restore_state_to_opc = hppa_restore_state_to_opc, 175 176 #ifndef CONFIG_USER_ONLY 177 .tlb_fill = hppa_cpu_tlb_fill, 178 .cpu_exec_interrupt = hppa_cpu_exec_interrupt, 179 .do_interrupt = hppa_cpu_do_interrupt, 180 .do_unaligned_access = hppa_cpu_do_unaligned_access, 181 #endif /* !CONFIG_USER_ONLY */ 182 }; 183 184 static void hppa_cpu_class_init(ObjectClass *oc, void *data) 185 { 186 DeviceClass *dc = DEVICE_CLASS(oc); 187 CPUClass *cc = CPU_CLASS(oc); 188 HPPACPUClass *acc = HPPA_CPU_CLASS(oc); 189 190 device_class_set_parent_realize(dc, hppa_cpu_realizefn, 191 &acc->parent_realize); 192 193 cc->class_by_name = hppa_cpu_class_by_name; 194 cc->has_work = hppa_cpu_has_work; 195 cc->dump_state = hppa_cpu_dump_state; 196 cc->set_pc = hppa_cpu_set_pc; 197 cc->get_pc = hppa_cpu_get_pc; 198 cc->gdb_read_register = hppa_cpu_gdb_read_register; 199 cc->gdb_write_register = hppa_cpu_gdb_write_register; 200 #ifndef CONFIG_USER_ONLY 201 dc->vmsd = &vmstate_hppa_cpu; 202 cc->sysemu_ops = &hppa_sysemu_ops; 203 #endif 204 cc->disas_set_info = hppa_cpu_disas_set_info; 205 cc->gdb_num_core_regs = 128; 206 cc->tcg_ops = &hppa_tcg_ops; 207 } 208 209 static const TypeInfo hppa_cpu_type_info = { 210 .name = TYPE_HPPA_CPU, 211 .parent = TYPE_CPU, 212 .instance_size = sizeof(HPPACPU), 213 .instance_init = hppa_cpu_initfn, 214 .abstract = false, 215 .class_size = sizeof(HPPACPUClass), 216 .class_init = hppa_cpu_class_init, 217 }; 218 219 static void hppa_cpu_register_types(void) 220 { 221 type_register_static(&hppa_cpu_type_info); 222 } 223 224 type_init(hppa_cpu_register_types)